Square.



PATENTED DEC. 5, 1905. F. G. BREUL. SQUARE. APPLICATION FILED n d.1'a, 1904 y federa alarm?,- v

UNITED sTA-TEs PATENT- CEEICE.

FREDERICK e. BREUL, or BRIDGEPCRT, CONNECTICUT. I

.'SQUARE.

Specification of Letters Patent..

Patented Dec. 5, 1905.

Application led December 13, 1904. Serial No. 236,676.

To a/ZZ whom it nca/y concern/.f

Be it known that I, FREDERICK G. BREUL, av

vide a novel construction of back fordiferent styles of squares-asjor instance, trysquares, bevel-squares,T-squares, &c.; further, to produce a back from a single piece of metal which will comprise two side portions, each portion having both longitudinal edges flanged to form two straight edges in a way to permit boththe inner and outer edges of the back to be used as a straight-edge; further, to construct the back in a manner that will allow theblade l to be adjusted to any angle.

Referring to the 'accompanying drawings,

forming apart of this specification, similar characters of reference denote like or corresponding parts throughout the several gures,

and of which- Figure 1 shows a perspectiveview of av bevel-square provided with my improved back and having an adjustable blade. Fig. 2 is an end view of the square seen'in Fig. 1. Fig. 3 is a detached end view of the back. Fig. 4 is a plan view of a blank from which the back is formed, and Fig. 5 shows a side view of a try-square provided with a back constructed in accordance with my invention.

Steel squares of this class having a doublestraight-edge back have heretofore been made of three sheet-metal parts, the back being formed lin two pieces and the blade comprising the third, as disclosed in allowed application of R. A. Breul, Serial No. 209,597. In

my present application I am able to produce l a back for square possessing all the merits and advantages of the before-mentioned square,

V including double straight edges, from a single piece of sheet metaLwhich insures a reduction in cost.

Referring to the characters of reference marked upon the drawings, A indicates a blank from which my back is formed. This Vmay' obviously be stamped or otherwise cut from sheet-steel and then by a couple of additional operations struck up into the shape shown for the purposes of forming a back complete ready for assembling. The rst operation upon the blank would be to strike up the four side edges B, deflecting thestock thereof at a right angle, forming the broad straight edges C C and D D,the two former representing the inner straight edges of the back, while the latter indicate the outer straight edges. These edges C andD are exactly par` allel with each other and serve to engage the edge of the stock to be squared or marked.v

The blank after being operated upon as 'above is then bent across its intermediate portion E, forminga closed end E' and bringing the two side portions F and G also parallel with each other, but not into engagement, leaving a space H therebetween of substantially uniform width and slightly greater 4than that of the thickness of the blade I.

In the construction of a back for use' in a miter-square, as shown in Figs. land 2, the ends J ,would be rounded and each provided with a central hole J toregister with that of the other for the reception of an adjustable pivotal screw K. through a slot L in the adjustable blade I to allow said blade to be pivoted and shifted longitudinally thereon, said blade being adapted to swing in both directions and either end .to

This screw freely passesl pass intermediate of the sides ofthe back and to be secured in any of said adjusted positions by means of the nut M on thescrew K.

In the construction of a try-square asshown in Fig. ,5 the back would preferably be se- -cured to the blade by means of rivets O, 'any number of which may be'employed, it being obvious that said blade `is rigidly disposed at a right angle to the back. y Having thus described my invention, what I claim, and desire to secure by Letters Patent isl. In a square of the class described, the combination with a back formed of a single piece of sheet'metal, bent transversely of its length forming two sides with a closed'outer end and an open inner end and having one or both of its adjacent pairs of parallel edges turned and deflected outward to form a broadened engaging surface, and a blade adjustably pivoted intermedi'ate of the free ends of the back.

2. Ina square of the class described,the com# binationy of a back formed of a single 'piece of sheet metal bent transversely of its length to IOC form two side portions disposed parallel with i i each other, outwardly-disposed straight and parallel flanges on both of the longitudinal edges of each of said side portions, and a blade attached to the free ends of such side portions.

3. In a square ofthe class desoribed,the Colnbnation of a back formed of a single piece of sheet metal, bent transversely of its length forming two sides with a closed outer end and an open inner end and having its parallel edges IO turned at a right angle to broaden the engaging surfaces, and a blade adjustably pivoted inerlnediate of the free ends of the back mem- Signed at Bridgeport, inthe county of Fairfield and State ot' Connecticut, this (5th day of September, A. D. 1905.

FREDERICK G. BREUL. llfitnesses:

C. M. NEWMAN, RUTH RAYMOND. 

